DKIM, which is an abbreviation for DomainKeys Identified Mail, is an authentication system, which obstructs email addresses from being forged and email content from being manipulated. This is done by attaching a digital signature to each and every email sent from an address under a particular domain name. The signature is published based on a private key that’s available on the outgoing mail server and it can be verified using a public key, which is available in the global DNS database. Thus, any email with changed content or a spoofed sender can be spotted by email service providers. This technology will enhance your worldwide web security considerably and you will be sure that any e-mail message sent from a business ally, a bank, etc., is genuine. When you send emails, the recipient will also be sure that you are indeed the one who has sent them. Any mail that appears to be fraudulent may either be flagged as such or may never enter the recipient’s inbox, based on how the particular provider has decided to cope with such messages.